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Wyszukujesz frazę "Chen, Tzu-Chia" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Sustainable operation of surface-groundwater conjunctive use systems in the agricultural sector
Autorzy:
Chen, Tzu-Chia
Hsieh, Tsung-Shun
Shichiyakh, Rustem A.
Powiązania:
https://bibliotekanauki.pl/articles/2048534.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
agriculture
conjunctive use systems
groundwater
operating cost
surface water
water management
Opis:
Several conjunctive use approaches can be distinguished. Drought cycling of groundwater (GW) usage and storage relies on more surface water (SW) during wetter years and delivers more water from GW during drought years. This method has the benefit of temporal changes in water availability. Additionally, it is usually desirable in areas with internal variability of SW where surface storage of wet-year surpluses is uneconomical, suffer excessive evaporative losses, or cause unacceptable environmental disruption. In previous studies, the purpose of operating the drought cycling was to reduce operating costs. In these studies, the objective function of the proposed model was to minimise the present value cost derived from the system design and operation to satisfy a predefined demand during a finite planning and operation horizon. However, it is important to consider other objectives in operating water resources systems, including minimising water shortages accurately. Hence, in this study, two scenarios were focused on: 1) mi-nimising water shortagages, 2) minimising operational costs. Pareto solutions are then presented with the objectives of minimising costs and water deficit. In this study, the weighting method has been used to extract Pareto options. The results show that reducing costs from 234 to 100 mln USD will increase water shortage from 9.3 to 11.3 mln m3.
Źródło:
Journal of Water and Land Development; 2021, 51; 25-29
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation and calibration of thermal and salinity layering in surface water resources using Ce-Qual-W2 model
Autorzy:
Chen, Tzu-Chia
Yu, Shu-Yan
Wang, Chang-Ming
Xie, Sen
Barazandeh, Hanif
Powiązania:
https://bibliotekanauki.pl/articles/2048504.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Ce-Qual-W2 model
salinity
surface water
thermal layering
water quality modelling
water resources
Opis:
In the discussion of water quality control, the first and most effective parameter that affects other variables and water quality parameters is the temperature situation and water temperature parameters that control many ecological and chemical processes in reservoirs. Additionally, one of the most important quality parameters studied in the quality of water resources of dams and reservoirs is the study of water quality in terms of salinity. The salinity of the reservoirs is primarily due to the rivers leading into them. The control of error in the reservoirs is always considered because the outlet water of the reservoirs, depending on the type of consumption, should always be standard in terms of salinity. Therefore, in this study, using the available statistics, the Ce-Qual-W2 two-dimensional model was used to simulate the heat and salinity layering of the Latyan Dam reservoir. The results showed that with warming and shifting from spring to late summer, the slope of temperature changes at depth increases and thermal layering intensifies, and a severe temperature difference occurs at depth. The results of sensitivity analysis also showed that by decreasing the wind shear coefficient (WSC), the reservoir water temperature increases, so that by increasing or decreasing the value of this coefficient by 0.4, the average water temperature by 0.56°C changes inversely, and the results also show that by increasing or decreasing the value of the shade coefficient by 0.85, the average water temperature changes by about 7.62°C, directly.
Źródło:
Journal of Water and Land Development; 2021, 51; 117-123
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploring EFL Teachers’ Perspectives of Professional Knowledge and Teaching Efficacy in Vocational High Schools
Autorzy:
Tzu-Ching Chen, Kate
Chia-Li Chen, Sabina
Powiązania:
https://bibliotekanauki.pl/articles/16530438.pdf
Data publikacji:
2013-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
vocational high school
EFL teachers
professional knowledge
teaching efficacy
Taiwan
Opis:
The presented study was conducted to investigate vocational high school EFL teachers’ professional knowledge and teaching efficacy from teachers’ perspectives. Data were collected through a questionnaire and analyzed by frequency distribution, t-test, ANOVA, Pearson correlation and stepwise regression. The results indicated that teachers have higher performance on professionalism and attitude to professional knowledge; teaching and class management in teaching efficacy. A significantly positive correlation was found between EFL teachers’ professional knowledge and teacher efficacy. Teachers reported that professional skills, professionalism, and attitude in professional knowledge were significant predictors of teaching efficacy. Professional knowledge helps to shape effective teaching.
Źródło:
The New Educational Review; 2013, 34; 270-279
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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